<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
     .one{
        width: 793px;
        height: 361px;
        margin: 50px auto;
        position: relative;
    
     }
     .two{
        width: 793px;
        height: 198px;
        margin-bottom: 70px;
        position: absolute;
        top: 0px;
        left: 0px;
     }
     p{
        width: 402px;
        height:70px;
        color: gray;
        text-align: center;
        line-height: 70px;
        border: 1px solid gray;
        
        position: absolute;
        bottom: 67px;
        left: 195px;
     }
     p:hover{
        color: blue;
        border-color: blue;
     }
     div:hover .two{
        border-style: solid;
        border-color: blue;
        
     }
     .three{
        width: 793px;
        height: 361px;
        background-color: black;
        opacity: 0.3;
        color: white;
        text-align: center;
        line-height: 361px;
        font-size: large;
        display: none;
     }
     div:hover .three{
        display: block;
     }

    </style>
</head>
<body>
    <div class="one">
        <div class="two"><img src="imag/f4871fa962424e85a1f2e8b35741a0b5.jpg" alt=""></div>
        <p> 微电影《青春代码》</p>
        <div class="three">你好</div>
    </div>
</body>
</html>